JP3734922B2

JP3734922B2 - Freezer refrigerator

Info

Publication number: JP3734922B2
Application number: JP10561797A
Authority: JP
Inventors: 明兵藤; 修浅川; 義人木村; 義則河田
Original assignee: 松下冷機株式会社
Priority date: 1997-04-23
Filing date: 1997-04-23
Publication date: 2006-01-11
Anticipated expiration: 2017-04-23
Also published as: JPH10300316A

Abstract

PROBLEM TO BE SOLVED: To prevent the in-chamber temperature from dropping due to the out-flow of the cold air from a cooler chamber in a refrigerator having a freezer in which a cooler is provided in a refrigeration chamber. SOLUTION: A refrigerator having a freezer is provided with a freezing cycle in which a compressor 11, condenser, a reducing device, a cooler 10 for refrigeration, and a cooler 8 for freezing are successively connected, an air feed fan to feed the cold air which is heat-exchanged by the cooler to a refrigeration chamber 3 and a freezing chamber 2, and a cooler chamber 20 comprising the cooler 10 for refrigeration, an air feed fan 9 for refrigeration, a suction duct 15 to lead the air in the refrigeration chamber 2 in the cooler 10 for refrigeration, and a discharge duct 16 to lead the cold air cooled by the cooler 10 for refrigeration into the refrigeration chamber 2. A suction duct forms an inversely U-shaped air passage, the cooler 10 for refrigeration is arranged on the downstream side of the air passage to such the air from an upper part of the cooler for refrigeration and discharge the air from a lower part, and no cold air flows into the refrigeration chamber 2 from the cooler chamber 20 for refrigeration, and the inside of the refrigeration chamber 2 can be kept at appropriate temperature.

Description

【０００１】
【発明の属する技術分野】
本発明は、冷凍室および冷蔵室に各々冷却器を備えた冷凍冷蔵庫において、冷蔵室内の温度低下の防止及び冷却効率の向上及び除霜効率の向上に関するものである。
【０００２】
【従来の技術】
従来の冷蔵庫は、特開平８−２４０３７３号公報にて知られるような構成を持っている。以下、図７を参考に従来の冷蔵庫の構成について説明を行う。
【０００３】
冷蔵庫本体１内には、中間壁部材３０によって上下部に仕切られた、食品を貯蔵する冷凍室３および冷蔵室２が形成されており、冷蔵庫本体１の全面には、冷凍室３および冷蔵室２を開閉させるドア５，４がそれぞれ装着されている。
【０００４】
冷凍室３の後側には、庫内から吸込された空気を冷媒の蒸発潜熱により冷却する冷凍用冷却器８が設けられており、冷凍用冷却器８の上側には冷凍用冷却器８により熱交換された冷気を冷凍室３内に循環させる、冷凍室送風ファン７がファンモータ３１の回転軸に設けられている。
【０００５】
冷蔵室２には内部空間を多数の空間に仕切ると伴に、貯蔵食品を載上する複数の棚３２が設けられており、冷蔵室２の上方には特定温度帯で特定食品を保管するための特鮮室３３が形成されている。
【０００６】
野菜室６の下部に位置する機械室には、圧縮機１１が設けられている。
冷蔵室２の後方には冷蔵室用冷気吐出手段３４が設けられており、特鮮室３３の後方には冷気吐出口３５を形成する特鮮室用ダクト部材３６が設けられている。また、特鮮室用ダクト部材３６の後方には、空気導入路３７を通して吸入された空気を熱交換する冷蔵用冷却器１０が設けられており、冷蔵用冷却器１０の上方には、空気導入路３７を通して吸入された空気を冷蔵用冷却器１０で熱交換し、冷気吐出口３５，３８を通して冷蔵室２および特鮮室３３に循環させるように、冷蔵室送風ファン９がファンモータ３９の回転軸に設けられている。
【０００７】
【発明が解決しようとする課題】
しかしながら上記従来の構成では、冷蔵室２の冷却が終了し冷蔵室送風ファン９が停止した後も、冷凍室３の冷却は続くため、冷蔵用冷却器１０内を流れる冷媒により冷蔵用冷却器１０近傍の空気は冷却され、冷却された空気は自然対流により冷蔵室冷却器１０よりも下に流れるので、冷気吐出口３８より冷蔵室２内に冷気が流出し、冷蔵室２内を設定温度以下に下げるという問題がある。
【０００８】
また、冷蔵室２内は食品から蒸発する水分が多いことや、ドア開閉頻度が高く外気侵入量が多いこと等から湿度が高いため、冷蔵用冷却器１０の着霜量が多く冷却効率が悪くなるという問題点がある。
【０００９】
本発明は従来の課題を解決するもので、冷蔵室２内が設定温度以下に下がることを防止し、冷蔵用冷却器１０の冷却効率及び除霜効率の向上による省エネを図ることが可能な冷凍冷蔵庫を提供することである。
【００１０】
【課題を解決するための手段】
この課題を解決するために本発明の冷蔵庫は、少なくともひとつの冷凍室と、前記冷凍室に設けた冷凍用冷却器と、少なくともひとつの冷蔵室と、前記冷蔵室に設けた冷蔵用冷却器と、前記冷凍室と前記冷蔵室を独立して構成した冷蔵庫本体と、圧縮機，凝縮器，絞り装置，前記冷蔵用冷却器，前記冷凍用冷却器とを順次接続した冷凍サイクルと、前記冷凍用冷却器と前記冷蔵用冷却器とにより熱交換した冷気を前記冷凍室と前記冷蔵室に供給するようそれぞれ配置された冷凍室送風ファンと、冷蔵室送風ファンと、前記冷蔵室内の空気を前記冷蔵用冷却器に導く吸込ダクトと、前記冷蔵用冷却器により冷却された冷気を前記冷蔵室内へ導く吐出ダクトと、前記冷蔵用冷却器と前記冷蔵室送風ファンと吸込ダクトと吐出ダクトとで構成される冷蔵用冷却器室とを有し、前記吸込ダクトは逆Ｕ字型の風路を形成し、前記吸込ダクトの風路の下流側に前記冷蔵用冷却器を配設し、空気を前記冷蔵用冷却器上部から吸入し、下部より吐出するように構成したものである。
【００１１】
これにより、冷蔵室送風ファン停止後の圧縮機運転時における、冷蔵用冷却器室からの冷気の流出による、冷蔵室内の冷えすぎを防止することができる。
【００１２】
また、冷蔵室冷却器上部のフィンピッチを広く、冷蔵室冷却器下部のフィンピッチを狭く構成したものである。
【００１３】
これにより、冷蔵室の冷却運転時における冷蔵用冷却器部での空気の流れは、重力と同じ方向になるので比重の重い高湿の空気は、下方へ流れやすく冷蔵用冷却器への着霜を均一化することができ、冷蔵用冷却器の冷却効率の向上および除霜効率を向上することができる。
【００１４】
また、冷蔵用冷却器を表面に撥水処理を施した撥水冷蔵用冷却器とし、圧縮機停止中にも冷蔵室送風ファンを運転するように構成したものである。
【００１５】
これにより、冷却運転時に冷蔵用冷却器へ着いた霜は、圧縮機停止中の冷蔵室送風ファン運転により昇華・融解する。冷蔵室送風ファン運転時の冷蔵用冷却器部における空気の流れが、重力と同じ方向であり、また、冷蔵用冷却器表面は撥水処理が施されているので、冷蔵用冷却器表面に残る水滴も冷蔵用冷却器下部にすべて落下し、再冷却時の着霜量を抑制できることから、冷蔵用冷却器の冷却効率の向上およびノンヒートデフロストが可能である。
【００１６】
また、冷蔵室送風ファンを回転数可変冷蔵室送風ファンとし、冷蔵用冷却器の温度を検知する冷蔵用冷却器温度検知手段とを備え、圧縮機停止からの前記回転数可変冷蔵室送風ファン運転時に、運転開始からの任意の時間における冷蔵用冷却器の温度が任意に設定した温度以下の場合、冷蔵用冷却器の温度が任意に設定した温度になるまで、前記回転数可変冷蔵室送風ファンの回転数を通常冷却時よりも上げて運転するように構成したものである。
【００１７】
これにより、過負荷時等のように圧縮機の停止時間が短く、冷蔵用冷却器への着霜量が多い場合においても、短時間で冷蔵用冷却器の除霜が可能である。
【００１８】
【発明の実施の形態】
本発明の請求項１に記載の発明は、少なくともひとつの冷凍室と、前記冷凍室に設けた冷凍用冷却器と、少なくともひとつの冷蔵室と、前記冷蔵室に設けた冷蔵用冷却器と、前記冷凍室と前記冷蔵室を独立して構成した冷蔵庫本体と、圧縮機，凝縮器，絞り装置，前記冷蔵用冷却器，前記冷凍用冷却器とを順次接続した冷凍サイクルと、前記冷凍用冷却器と前記冷蔵用冷却器とにより熱交換した冷気を前記冷凍室と前記冷蔵室に供給するようそれぞれ配置された冷凍室送風ファンと、冷蔵室送風ファンと、前記冷蔵室内の空気を前記冷蔵用冷却器に導く吸込ダクトと、前記冷蔵用冷却器により冷却された冷気を前記冷蔵室内へ導く吐出ダクトと、前記冷蔵用冷却器と前記冷蔵室送風ファンと吸込ダクトと吐出ダクトとで構成される冷蔵用冷却器室とを有し、前記吸込ダクトは逆Ｕ字型の風路を形成し、前記吸込ダクトの風路の下流側に前記冷蔵用冷却器を配設し、空気を前記冷蔵用冷却器上部から吸入し、下部より吐出することを特徴とする冷凍冷蔵庫であり、冷蔵室送風ファン停止後の圧縮機運転時における、冷蔵用冷却器からの冷気は、吐出ダクト側に流れ吐出ダクト内で停滞するという作用を有する。
【００１９】
本発明の請求項２に記載の発明は、上部のフィンピッチを広く、下部のフィンピッチが狭い冷蔵用冷却器を備えることを特徴とする請求項１記載の冷凍冷蔵庫であり、冷蔵室冷却器部における空気は、冷却器上部から下部へ重力と同じ方向に流れ、空気中に含まれていた水分は冷蔵室冷却器に均一に着霜するという作用を有する。
【００２０】
本発明の請求項３に記載の発明は、冷蔵用冷却器を表面に撥水処理を施した撥水冷蔵用冷却器とし、圧縮機停止中にも冷蔵室送風ファンを運転することを特徴とする請求項１または２記載の冷凍冷蔵庫であり、圧縮機停止中の冷蔵室送風ファン運転時に冷却運転時についた霜を昇華・融解させると伴に、冷蔵用冷却器表面に残った水滴もすべて冷蔵用冷却器下部に落下させるという作用を有する。
【００２１】
本発明の請求項４に記載の発明は、冷蔵室送風ファンを回転数可変冷蔵室送風ファンとし、冷蔵用冷却器の温度を検知する冷蔵用冷却器温度検知手段とを備え、圧縮機停止からの前記回転数可変冷蔵室送風ファン運転時に、運転開始からの任意の時間における冷蔵用冷却器の温度が任意に設定した温度以下の場合、冷蔵用冷却器の温度が任意に設定した温度になるまで、前記回転数可変冷蔵室送風ファンの回転数を通常冷却時よりも上げて運転することを特徴とする請求項１から３のいずれか一項記載の冷凍冷蔵庫であり、過負荷時等のように冷蔵用冷却器への着霜量が多い場合であっても、回転数可変冷蔵室送風ファンの回転数が上がり風量が増加するので、短時間で冷蔵用冷却器の除霜を行うという作用を有する。
【００２２】
以下、本発明の実施の形態について、図１〜図６を用いて説明する。但し、従来と同一構成については、同一の符号を付し、詳細な説明を省略する。
【００２３】
（実施の形態１）
図１は、本発明の冷蔵庫の第一の実施例の断面概略図、図２は同実施の形態による冷却システム図である。
【００２４】
１は冷凍冷蔵庫本体であり、上方部に冷蔵室２を、下方部に冷凍室３を配置してある。冷凍室３にはバケット１９が内蔵されており、食品等の収納物はバケット１９内に収納されて用いられるものである。
【００２５】
冷凍室３内の背面部には、冷凍用冷却器室２１が形成されている。この冷凍用冷却器室２１内には、冷気を生成する冷凍用冷却器８と冷気を送風する冷凍室送風ファン７が配設されている。
【００２６】
また、冷蔵室２内は仕切板によって、いくつかの収納区分に区切られており、食品等が収納されて用いられる。
【００２７】
冷蔵室２内の背面部上部には、冷蔵用冷却器室２０が形成されている。この冷蔵用冷却器室２０内には、冷気を生成する冷蔵用冷却器１０と冷気を送風する冷蔵室送風ファン９と冷蔵室２内の空気を冷蔵用冷却器１０に導く吸込ダクト１５と冷蔵用冷却器１０で熱交換し冷却された空気を冷蔵室２内へ導く吐出ダクト１６が配設されている。
【００２８】
冷蔵室送風ファン９は、冷蔵用冷却器室２０内の上部に配設されており、ファンリング下部１７は、冷蔵用冷却器１０上端よりも高い位置に配設されている。
【００２９】
吸込ダクト１５は、冷蔵用冷却器１０の手前に配設されており、冷蔵室２内に開口している吸込口１４から冷蔵用冷却器１０上部につながる。
【００３０】
吐出ダクト１６は、冷蔵用冷却器１０の奥に配設されており、冷蔵用冷却器１０下部からファンリング下部１７，吐出口１８を経由して冷蔵室２内につながる。
【００３１】
また、圧縮機１１，凝縮器１２，絞り装置１３，冷蔵用冷却器１０，冷凍用冷却器８とを順次接続して冷凍サイクル６を形成している。
【００３２】
上記の構成において、冷蔵室２を冷却するときは、圧縮機１１及び冷蔵室送風ファン９が運転を開始し、冷蔵用冷却器１０内に冷媒が送られる。冷蔵室２内の空気は、吸込口１４より吸い込まれ吸込ダクト１５を通り冷蔵用冷却器１０へ送られ、冷蔵用冷却器１０内冷媒の蒸発潜熱により冷却される。冷蔵用冷却器１０で冷却された空気は、吐出ダクト１６を通り吐出口１８から冷蔵室２内へ吐出される。このような、冷蔵室送風ファン９の運転による空気の循環により、冷蔵室２内は設定温度まで冷却される。
【００３３】
そして、冷蔵室２の温度が設定温度になると、冷蔵室送風ファン９は運転を停止し、冷蔵室２内の空気の循環も止まる。しかし、圧縮機１１は冷凍室３の冷却のため運転を続けるので、冷蔵用冷却器１０内の冷媒の流れも冷凍室３が設定温度になるまで続く。この冷媒の流れにより、冷蔵用冷却器１０近傍の空気が冷却される。冷却された空気は比重が増加し、冷蔵用冷却器１０の下部へ流れる自然対流による空気の流れが発生する。冷蔵用冷却器１０からの空気は吐出ダクト１６内に流れてくるが、ファンリング下部１７の位置が冷蔵用冷却器１０上端よりも高い位置に配設されているため、吐出ダクト１６内で空気の流れは停滞する。
【００３４】
以上のように、冷蔵室送風ファン９運転停止後の圧縮機１１運転時において、冷蔵用冷却器１０で冷却された冷気は、自然対流により冷蔵用冷却器１０の下部へ流れるので、吸込口１４より冷蔵室２内へ流出することはない。また、冷蔵用冷却器１０下部から吐出ダクト１６へ流れる冷気も吐出ダクト１６内で停滞するので、吐出口１８から冷蔵室２内へ流出することもなく、冷蔵室２の温度が設定温度以下になることを防止することができる。
【００３５】
（実施の形態２）
図３は、本発明の冷蔵庫の第２の実施例の冷蔵用冷却器の正面図と冷蔵用冷却器室の拡大図である。
【００３６】
冷蔵室冷却器１０のフィンピッチは、設置方向に対して上部が広く下部へ行くに従い徐々に狭くなるように構成したものである。また、冷蔵室送風ファン９運転時における冷蔵用冷却器１０部での空気の流れは、冷蔵室２内より吸い込まれた空気がフィンピッチの広い上部から流れ、冷蔵室冷却器１０で冷却された空気がフィンピッチの狭い下部より吐出される。
【００３７】
以上のように、冷蔵室冷却器１０のフィンピッチを設置方向に対して上部が広く下部へ行くに従い徐々に狭くすることで、冷蔵用冷却器１０への着霜を均一化することができ、冷蔵用冷却器１０の冷却効率の向上および除霜効率を向上することができる。
【００３８】
なお、図３に示す冷蔵用冷却器１０のプレートフィンは３段であるが、２段以上であれば同様の効果がある。
【００３９】
（実施の形態３）
図４は、本発明の冷蔵庫の第３の実施例の撥水冷蔵用冷却器の正面図と撥水冷蔵用冷却器の細部拡大図である。
【００４０】
撥水冷蔵用冷却器２２は、プレートフィン２３と冷媒配管２４により構成されている。プレートフィン２３と冷媒配管２４の表面には、撥水性塗膜が施されており着霜を抑制するものである。
【００４１】
図５は、本発明の冷蔵庫の第３の実施例のタイムチャートである。以下その動作について図面を参考に説明する。
【００４２】
冷凍室温度検知手段２７の検知温度が、予め設定された所定の冷凍室温度の温度範囲の上限を越えると、圧縮機１１及び冷凍室送風ファン７が運転を開始する。このとき、冷蔵室温度検知手段２６の検知温度も、予め設定された所定の冷蔵室温度の温度範囲の上限を越えていれば、冷蔵室送風ファン９も運転を開始する。これにより、撥水冷蔵用冷却器２２及び冷凍用冷却器８内に冷媒が送られ、冷凍室３及び冷蔵室２の冷却が始まる。冷凍室温度検知手段２７及び冷蔵室温度検知手段２６の検知温度が、予め設定された所定の温度範囲の下限を越えると、冷蔵室送風ファン７及び冷蔵室送風ファン９は各々運転を停止し、圧縮機１１も運転を停止する。圧縮機１１が停止すると、冷蔵室送風ファン９の運転を再び開始する。冷却器温度検知手段２８の検知温度が、予め設定された所定の冷却器温度を越えると冷蔵室送風ファン９は運転を停止する。本発明の請求項４に係る真空断熱材または真空断熱体の再資源化処理方法は、冷蔵庫を形成する断熱箱体を破砕する破砕工程と、前記破砕工程に続いて前記断熱箱体から芯材と外被材がともにポリエステル樹脂材料からなる真空断熱材または芯材と内箱，外箱がともにポリエステル樹脂材料からなる真空断熱体を分離する分離処理工程と、分離された前記真空断熱材の芯材および外被材または前記真空断熱体の芯材および内箱，外箱を回収する真空断熱材処理工程と、回収された前記芯材および外被材、または、芯材および内箱，外箱を真空断熱材または真空断熱体に使用する樹脂再生品として再生する再原料化製造工程を含むものである。
【００４３】
以上のように、冷却運転時に撥水冷蔵用冷却器２２へ着いた霜は、圧縮機１１停止中の冷蔵室送風ファン９運転により昇華・融解する。冷蔵室送風ファン９運転時の撥水冷蔵用冷却器２２部における空気の流れが、重力と同じ方向であり、また、撥水冷蔵用冷却器２２表面は撥水処理が施されているので、撥水冷蔵用冷却器２２表面に残る水滴も撥水冷蔵用冷却器２２下部にすべて落下し、再冷却時の着霜量を抑制できることから、撥水冷蔵用冷却器２２の冷却効率を向上させることが可能である。
【００４４】
また、冷蔵室のノンヒートデフロストにより、除霜時の庫内温度上昇を防止でき、温度変動幅を小さくすることが可能である。
【００４５】
なお、本発明の冷蔵庫の撥水冷蔵用冷却器２２は、フィンコイル式熱交換器であるがこれに限定されるものではない。
【００４６】
（実施の形態４）
図６は、本発明の冷蔵庫の第４の実施例のタイムチャートである。以下その動作について図面を参考に説明する。
【００４７】
冷凍室温度検知手段２７の検知温度が、予め設定された所定の冷凍室温度の温度範囲の上限を越えると、圧縮機１１及び冷凍室送風ファン７が運転を開始する。このとき、冷蔵室温度検知手段２６の検知温度も、予め設定された所定の冷蔵室温度の温度範囲の上限を越えていれば、冷蔵室送風ファン９も運転を開始する。これにより、撥水冷蔵用冷却器２２及び冷凍用冷却器８内に冷媒が送られ、冷凍室３及び冷蔵室２の冷却が始まる。冷凍室温度検知手段２７及び冷蔵室温度検知手段２６の検知温度が、予め設定された所定の温度範囲の下限を越えると、冷蔵室送風ファン７及び冷蔵室送風ファン９は各々運転を停止する。圧縮機１１は、冷蔵室送風ファン７と同時に運転を停止する。圧縮機１１が停止すると、冷蔵室送風ファン９の運転を再び開始する。冷蔵室送風ファン９の運転開始からの任意の時間における撥水冷蔵用冷却器２２の温度上昇が任意の値以下の場合、冷蔵室送風ファン９の回転数を上げ運転を続ける。冷却器温度検知手段２８の検知温度が、予め設定された所定の冷却器温度を越えると冷蔵室送風ファン９は運転を停止する。
【００４８】
以上のように、撥水冷蔵用冷却器２２への着霜量が多い場合であっても、冷蔵室送風ファン９の回転数を上げて、風量を増加させるので撥水冷蔵用冷却器２２の霜による目詰まりを防止し、冷却効率を向上させることが可能である。
【００４９】
また、過負荷時等のように圧縮機１１の停止時間が短く、撥水冷蔵用冷却器２２への着霜量が多い場合においても、短時間で撥水冷蔵用冷却器２２の除霜が可能である。
【００５０】
【発明の効果】
以上のように本発明のによれば、少なくともひとつの冷凍室と、前記冷凍室に設けた冷凍用冷却器と、少なくともひとつの冷蔵室と、前記冷蔵室に設けた冷蔵用冷却器と、前記冷凍室と前記冷蔵室を独立して構成した冷蔵庫本体と、圧縮機，凝縮器，絞り装置，前記冷蔵用冷却器，前記冷凍用冷却器とを順次接続した冷凍サイクルと、前記冷凍用冷却器と前記冷蔵用冷却器とにより熱交換した冷気を前記冷凍室と前記冷蔵室に供給するようそれぞれ配置された冷凍室送風ファンと、冷蔵室送風ファンと、前記冷蔵室内の空気を前記冷蔵用冷却器に導く吸込ダクトと、前記冷蔵用冷却器により冷却された冷気を前記冷蔵室内へ導く吐出ダクトと、前記冷蔵用冷却器と前記冷蔵室送風ファンと吸込ダクトと吐出ダクトとで構成される冷蔵用冷却器室とを有し、前記吸込ダクトは逆Ｕ字型の風路を形成し、前記吸込ダクトの風路の下流側に前記冷蔵用冷却器を配設し、空気を前記冷蔵用冷却器上部から吸入し、下部より吐出する構成により、冷蔵室送風ファン停止後の圧縮機運転時における、冷蔵用冷却器室からの冷気の流出はなくなり、冷蔵室の庫内温度を適正に保つことができるという効果を有する。
【００５１】
また、冷蔵室冷却器上部のフィンピッチを広く、冷蔵室冷却器下部のフィンピッチを狭くした構成により、冷蔵室冷却器部においては、重力の作用する方向に空気が流れ、空気の流れに従い徐々にフィンピッチが狭まるので、冷蔵用冷却器への着霜が均一化される。これより、冷却運転時の風量が確保され、冷蔵室冷却器の熱交換を高効率に維持できる。併せて、冷蔵用冷却器の除霜周期を延長することができるという効果を有する。
【００５２】
さらに、冷蔵用冷却器を表面に撥水処理を施した撥水冷蔵用冷却器とし、圧縮機停止中にも冷蔵室送風ファンを運転する構成により、冷却運転時の冷蔵用冷却器の熱交換を常に高効率に保つことができる。また、冷蔵用冷却器のヒータによる除霜の必要がないので、消費電力量を低減できる。併せて、除霜時の庫内温度上昇を抑制できるという効果を有する。
【００５３】
さらにまた、冷蔵室送風ファンを回転数可変冷蔵室送風ファンとし、冷蔵用冷却器の温度を検知する冷蔵用冷却器温度検知手段とを備え、圧縮機停止からの前記回転数可変冷蔵室送風ファン運転時に、運転開始からの任意の時間における冷蔵用冷却器の温度が任意に設定した温度以下の場合、冷蔵用冷却器の温度が任意に設定した温度になるまで、前記回転数可変冷蔵室送風ファンの回転数を通常冷却時よりも上げて運転する構成により、過負荷時等のように圧縮機の停止時間が短く、冷蔵用冷却器への着霜量が多い場合においても、短時間で冷蔵用冷却器の除霜を行うことができるという効果を有する。
【図面の簡単な説明】
【図１】本発明による冷蔵庫の第一の実施例の断面概略図
【図２】本発明による冷蔵庫の第一の実施例の冷凍システム図
【図３】本発明による冷蔵庫の第二の実施例の冷蔵室冷却器正面図
【図４】本発明による冷蔵庫の第三の実施例の冷蔵室冷却器正面図
【図５】本発明による冷蔵庫の第三の実施例のタイムチャート
【図６】本発明による冷蔵庫の第四の実施例のタイムチャート
【図７】従来の冷蔵庫の断面概略図
【符号の説明】
１冷蔵庫本体
２冷蔵室
３冷凍室
６冷凍サイクル
７冷凍室送風ファン
８冷凍用冷却器
９冷蔵室送風ファン
１０冷蔵用冷却器
１１圧縮機
１２凝縮器
１３絞り装置
１５吸込ダクト
１６吐出ダクト
２０冷蔵用冷却器室
２２撥水冷蔵用冷却器
２６冷蔵室温度検知手段
２７冷凍室温度検知手段
２８冷却器温度検知手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to prevention of temperature drop in a refrigerator compartment, improvement of cooling efficiency, and improvement of defrosting efficiency in a refrigerator-freezer provided with a refrigerator in each of a freezer compartment and a refrigerator compartment.
[0002]
[Prior art]
A conventional refrigerator has a structure as disclosed in Japanese Patent Application Laid-Open No. 8-240373. Hereinafter, the configuration of a conventional refrigerator will be described with reference to FIG.
[0003]
In the refrigerator main body 1, a freezer compartment 3 and a refrigerator compartment 2 for storing food, which are divided into upper and lower parts by an intermediate wall member 30, are formed. On the entire surface of the refrigerator body 1, the freezer compartment 3 and the refrigerator compartment are formed. Doors 5 and 4 for opening and closing 2 are respectively mounted.
[0004]
A refrigeration cooler 8 is provided on the rear side of the freezer compartment 3 to cool the air sucked from the inside by the latent heat of vaporization of the refrigerant, and above the refrigeration cooler 8 by the refrigeration cooler 8. A freezer compartment fan 7 that circulates the heat-exchanged cold air into the freezer compartment 3 is provided on the rotating shaft of the fan motor 31.
[0005]
In the refrigerator compartment 2, the internal space is divided into a number of spaces, and a plurality of shelves 32 on which stored foods are placed are provided. The refrigerator compartment 2 stores specific foods in a specific temperature zone above the refrigerator compartment 2. Special chamber 33 is formed.
[0006]
A compressor 11 is provided in the machine room located in the lower part of the vegetable room 6.
A refrigeration chamber cool air discharge means 34 is provided behind the refrigerator compartment 2, and a special chamber duct member 36 that forms a cool air outlet 35 is provided behind the special chamber 33. Further, a refrigeration cooler 10 for exchanging heat of air sucked through the air introduction path 37 is provided behind the duct member 36 for the special room, and an air introduction is provided above the refrigeration cooler 10. The refrigerating room blower fan 9 rotates the fan motor 39 so that the air sucked through the passage 37 exchanges heat with the refrigerating cooler 10 and is circulated to the refrigerating room 2 and the special room 33 through the cold air discharge ports 35 and 38. It is provided on the shaft.
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, since the cooling of the freezer compartment 3 continues even after the cooling of the refrigerating compartment 2 is finished and the refrigerating compartment blower fan 9 is stopped, the refrigerating cooler 10 is cooled by the refrigerant flowing in the refrigerating cooler 10. The nearby air is cooled, and the cooled air flows below the refrigerating room cooler 10 by natural convection, so that cold air flows out from the cold air discharge port 38 into the refrigerating room 2 and the inside of the refrigerating room 2 is below the set temperature. There is a problem of lowering.
[0008]
Further, since the inside of the refrigerator compartment 2 has a high humidity due to a large amount of water evaporating from the food, a high frequency of door opening and closing and a large amount of intruding outside air, the amount of frost formation of the refrigerator 10 for refrigeration is large and the cooling efficiency is poor. There is a problem of becoming.
[0009]
The present invention solves the conventional problem, prevents the inside of the refrigerating chamber 2 from dropping below the set temperature, and can achieve energy saving by improving the cooling efficiency and defrosting efficiency of the refrigerating cooler 10. To provide a refrigerator.
[0010]
[Means for Solving the Problems]
In order to solve this problem, the refrigerator of the present invention includes at least one freezer compartment, a freezer cooler provided in the freezer compartment, at least one refrigerator compartment, and a refrigerator refrigerator provided in the refrigerator compartment. A refrigerating cycle in which the freezer and the refrigerating chamber are independently configured, a compressor, a condenser, a throttling device, the refrigerating cooler, and the refrigerating cooler connected in sequence, and the refrigerating chamber A freezer compartment blower fan, a refrigerating compartment blower fan, and a refrigerating compartment blower fan, each of which is arranged to supply cold air heat-exchanged by the cooler and the refrigerating cooler to the freezer compartment and the refrigerating compartment, and the air in the refrigerating compartment is refrigerated. A suction duct that leads to the cooler for cooling, a discharge duct that guides the cool air cooled by the cooler for refrigeration to the refrigerator compartment, a cooler for cooling, the fan for the refrigerator compartment, a suction duct, and a discharge duct. Ru A suction cooler chamber, the suction duct forms an inverted U-shaped air path, the cooler for cooling is disposed on the downstream side of the air path of the suction duct, and air is used for the cold storage. It is configured to suck from the upper part of the cooler and discharge from the lower part.
[0011]
Accordingly, it is possible to prevent the refrigeration chamber from being overcooled due to the outflow of cold air from the refrigeration cooler chamber during compressor operation after the refrigeration chamber blower fan is stopped.
[0012]
Further, the fin pitch at the upper part of the refrigerator compartment cooler is widened and the fin pitch at the lower part of the refrigerator compartment cooler is narrowed.
[0013]
As a result, the flow of air in the refrigeration cooler during the cooling operation of the refrigeration room is in the same direction as gravity, so high-humidity air with a high specific gravity easily flows downward and forms frost on the refrigeration cooler. The cooling efficiency of the refrigeration cooler and the defrosting efficiency can be improved.
[0014]
Further, the refrigerating cooler is a water repellent refrigerating cooler having a surface subjected to water repellent treatment, and the refrigerating chamber blower fan is operated even when the compressor is stopped.
[0015]
As a result, the frost that has reached the refrigeration cooler during the cooling operation is sublimated and melted by the operation of the refrigeration chamber blower fan while the compressor is stopped. The air flow in the refrigeration cooler when the refrigeration room blower fan is operating is in the same direction as gravity, and the surface of the refrigeration cooler is water repellent so that it remains on the surface of the refrigeration cooler. All of the water droplets also fall below the refrigeration cooler, and the amount of frost formation during recooling can be suppressed. Therefore, the cooling efficiency of the refrigeration cooler can be improved and non-heat defrosting is possible.
[0016]
Further, the refrigerating compartment blowing fan and the variable rotational speed refrigerating compartment blowing fan, and a refrigerating cooler temperature detecting means for detecting the temperature of the refrigerating cooler, the variable rotational speed refrigerating compartment blowing fan from the compressor stops During operation, when the temperature of the refrigeration cooler at an arbitrary time from the start of operation is equal to or lower than the arbitrarily set temperature, the rotational speed variable refrigerating chamber air blows until the temperature of the refrigeration cooler reaches the arbitrarily set temperature. The fan is configured to operate at a higher rotational speed than during normal cooling.
[0017]
Thus, even when the compressor stop time is short, such as during overload, and the amount of frost on the refrigeration cooler is large, the refrigeration cooler can be defrosted in a short time.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention comprises at least one freezer compartment, a freezer cooler provided in the freezer compartment, at least one refrigerating room, a refrigerating cooler provided in the refrigerating room, Refrigeration cycle in which the freezer compartment and the refrigerator compartment are configured independently, a compressor, a condenser, a throttling device, the refrigerator for refrigeration, the refrigerator for freezing, and the cooling for freezing A freezer compartment blower fan, a refrigerator compartment blower fan, and a refrigerator compartment fan arranged to supply cold air exchanged by the refrigerator and the refrigerator refrigerator to the refrigerator compartment and the refrigerator compartment, and air in the refrigerator compartment for the refrigerator A suction duct leading to a cooler, a discharge duct guiding cool air cooled by the refrigeration cooler to the refrigeration chamber, a refrigeration cooler, the refrigeration chamber blower fan, a suction duct, and a discharge duct. Refrigeration cooling And the suction duct forms an inverted U-shaped air passage, the refrigeration cooler is disposed on the downstream side of the air passage of the suction duct, and air is supplied from an upper portion of the refrigeration cooler. The refrigerator is a refrigerator that is sucked and discharged from the lower part, and cold air from the refrigerator for refrigeration flows to the discharge duct side and stagnates in the discharge duct when the compressor is operated after the cooling room blower fan is stopped. It has the action.
[0019]
The invention according to claim 2 of the present invention is the refrigerator / freezer according to claim 1, further comprising a refrigerator for refrigeration having a wide upper fin pitch and a narrow lower fin pitch. The air in the section flows from the upper part of the cooler to the lower part in the same direction as the gravity, and the moisture contained in the air has the effect of uniformly frosting the cooler cooler.
[0020]
The invention according to claim 3 of the present invention is characterized in that the refrigeration cooler is a water repellent refrigeration cooler having a surface subjected to water repellency treatment, and the refrigeration chamber blower fan is operated even when the compressor is stopped. The refrigeration refrigerator according to claim 1 or 2, wherein the water droplets remaining on the surface of the refrigeration cooler are also sublimated and melted when the frost on the cooling operation is sublimated and melted during operation of the cooling chamber blower fan when the compressor is stopped. All have the effect of dropping to the lower part of the refrigerator for refrigeration.
[0021]
The invention according to claim 4 of the present invention, the refrigerating compartment blowing fan and the variable rotational speed refrigerating compartment blowing fan, and a refrigerating cooler temperature detecting means for detecting the temperature of the refrigerating cooler, the compressor stops When the temperature of the refrigeration cooler at an arbitrary time from the start of operation is equal to or lower than the arbitrarily set temperature during the operation of the variable speed refrigerating room blower fan , the temperature of the refrigeration cooler is set to the arbitrarily set temperature. made up, the rotational speed of the variable rotational speed refrigerating compartment blowing fan is refrigerator according to any one claim from claim 1, wherein 3 of that operation raise than in the normal cooling, overload, etc. Even if the amount of frost on the refrigeration cooler is large, the number of rotations of the refrigeration chamber variable fan increases and the air volume increases, so the refrigeration cooler is defrosted in a short time. It has the action.
[0022]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. However, the same reference numerals are given to the same components as those in the prior art, and detailed description thereof is omitted.
[0023]
(Embodiment 1)
FIG. 1 is a schematic cross-sectional view of a first embodiment of the refrigerator of the present invention, and FIG. 2 is a cooling system diagram according to the embodiment.
[0024]
Reference numeral 1 denotes a refrigerator-freezer main body, in which a refrigerator compartment 2 is arranged at the upper part and a refrigerator compartment 3 is arranged at the lower part. The freezer compartment 3 has a built-in bucket 19, and stored items such as food are stored in the bucket 19 and used.
[0025]
A refrigeration cooler chamber 21 is formed on the back surface in the freezer chamber 3. In the refrigeration cooler chamber 21, a refrigeration cooler 8 that generates cool air and a freezer compartment blower fan 7 that blows cool air are disposed.
[0026]
Moreover, the inside of the refrigerator compartment 2 is divided | segmented into the some storage division with the partition plate, and food etc. are accommodated and used.
[0027]
A refrigeration cooler chamber 20 is formed in the upper part of the back surface in the refrigerator compartment 2. In the refrigeration cooler room 20, a refrigeration cooler 10 that generates cold air, a refrigeration room blower fan 9 that blows cold air, a suction duct 15 that guides air in the refrigeration room 2 to the refrigeration cooler 10, and refrigeration. A discharge duct 16 that guides the air cooled by heat exchange in the cooler 10 into the refrigerator compartment 2 is provided.
[0028]
The refrigerating room blower fan 9 is disposed in the upper part of the refrigerating cooler room 20, and the fan ring lower part 17 is disposed at a position higher than the upper end of the refrigerating cooler 10.
[0029]
The suction duct 15 is disposed in front of the refrigeration cooler 10 and is connected to the upper portion of the refrigeration cooler 10 through a suction port 14 opened in the refrigeration chamber 2.
[0030]
The discharge duct 16 is disposed in the back of the refrigeration cooler 10 and is connected from the lower part of the refrigeration cooler 10 to the inside of the refrigeration chamber 2 via the fan ring lower part 17 and the discharge port 18.
[0031]
Further, the compressor 11, the condenser 12, the expansion device 13, the refrigeration cooler 10, and the refrigeration cooler 8 are sequentially connected to form the refrigeration cycle 6.
[0032]
In the above configuration, when the refrigerator compartment 2 is cooled, the compressor 11 and the refrigerator compartment blower fan 9 start operation, and the refrigerant is sent into the refrigerator 10 for refrigerator. The air in the refrigerator compartment 2 is sucked in from the suction port 14, passes through the suction duct 15, is sent to the refrigerator 10 for cooling, and is cooled by the latent heat of evaporation of the refrigerant in the refrigerator 10 for refrigerator. The air cooled by the refrigerator 10 for refrigeration passes through the discharge duct 16 and is discharged from the discharge port 18 into the refrigerator compartment 2. The inside of the refrigerator compartment 2 is cooled to the set temperature by the circulation of the air by the operation of the refrigerator compartment fan 9 as described above.
[0033]
And if the temperature of the refrigerator compartment 2 becomes preset temperature, the refrigerator air blower fan 9 will stop an operation | movement, and the circulation of the air in the refrigerator compartment 2 will also be stopped. However, since the compressor 11 continues to operate for cooling the freezer compartment 3, the flow of the refrigerant in the refrigeration cooler 10 continues until the freezer compartment 3 reaches a set temperature. This refrigerant flow cools the air near the refrigeration cooler 10. The cooled air has an increased specific gravity, and an air flow is generated by natural convection flowing to the lower part of the refrigeration cooler 10. The air from the refrigeration cooler 10 flows into the discharge duct 16, but the fan ring lower portion 17 is disposed at a position higher than the upper end of the refrigeration cooler 10, so the air in the discharge duct 16 The flow of stagnation.
[0034]
As described above, the cold air cooled by the refrigeration cooler 10 flows to the lower part of the refrigeration cooler 10 by natural convection during the operation of the compressor 11 after the operation of the refrigerator fan 9 is stopped. It does not flow out into the refrigerator compartment 2 more. Further, since the cold air flowing from the lower part of the refrigeration cooler 10 to the discharge duct 16 is also stagnated in the discharge duct 16, it does not flow out from the discharge port 18 into the refrigeration room 2, and the temperature of the refrigeration room 2 is below the set temperature. Can be prevented.
[0035]
(Embodiment 2)
FIG. 3 is a front view of the refrigeration cooler and an enlarged view of the refrigeration cooler chamber of the second embodiment of the refrigerator of the present invention.
[0036]
The fin pitch of the refrigerator compartment cooler 10 is configured such that the upper part is wider with respect to the installation direction and gradually becomes narrower toward the lower part. In addition, the flow of air in the cooler cooler 10 when the cooler fan 9 is in operation is such that the air sucked from the cooler 2 flows from the upper part of the fin pitch and is cooled by the cooler cooler 10. Air is discharged from the lower part where the fin pitch is narrow.
[0037]
As described above, by gradually narrowing the fin pitch of the refrigerating room cooler 10 as the upper part widens toward the lower side with respect to the installation direction, frost formation on the refrigerating cooler 10 can be made uniform, It is possible to improve the cooling efficiency and the defrosting efficiency of the refrigerator 10 for refrigeration.
[0038]
Although the plate fin of the refrigeration cooler 10 shown in FIG. 3 has three stages, the same effect can be obtained if it has two or more stages.
[0039]
(Embodiment 3)
FIG. 4 is a front view of a water repellent refrigeration cooler and a detail enlarged view of the water repellent refrigeration cooler of the third embodiment of the refrigerator of the present invention.
[0040]
The water repellent refrigeration cooler 22 includes plate fins 23 and a refrigerant pipe 24. The surface of the plate fin 23 and the refrigerant pipe 24 is provided with a water-repellent coating to suppress frost formation.
[0041]
FIG. 5 is a time chart of the third embodiment of the refrigerator of the present invention. The operation will be described below with reference to the drawings.
[0042]
When the detected temperature of the freezer compartment temperature detection means 27 exceeds the upper limit of a predetermined freezer compartment temperature range, the compressor 11 and the freezer compartment fan 7 start operation. At this time, if the temperature detected by the refrigerating room temperature detecting means 26 also exceeds the upper limit of a predetermined temperature range of the predetermined refrigerating room temperature, the refrigerating room blower fan 9 also starts operation. As a result, the refrigerant is sent into the water repellent refrigeration cooler 22 and the refrigeration cooler 8, and cooling of the freezer compartment 3 and the refrigeration compartment 2 starts. When the detected temperatures of the freezer compartment temperature detecting means 27 and the refrigerator compartment temperature detecting means 26 exceed the lower limit of a predetermined temperature range set in advance, the refrigerator compartment fan 7 and the refrigerator compartment fan 9 respectively stop operation, The compressor 11 also stops operation. When the compressor 11 stops, the operation of the refrigerator compartment blower fan 9 is started again. When the temperature detected by the cooler temperature detecting means 28 exceeds a predetermined cooler temperature set in advance, the refrigerating room blower fan 9 stops its operation. The recycling method of the vacuum heat insulating material or the vacuum heat insulating material according to claim 4 of the present invention includes a crushing step of crushing a heat insulating box forming a refrigerator, and a core material from the heat insulating box following the crushing step. Separating the vacuum insulation material or the core material and the inner box, both of which the outer casing material is made of a polyester resin material, and the vacuum insulation material of which the outer case is made of a polyester resin material, and the separated core of the vacuum insulation material Vacuum heat insulating material processing step for recovering the core material and outer cover material or the core material and inner box and outer box of the vacuum heat insulating body, and the recovered core material and outer cover material, or the core material and inner box and outer box This includes a re-raw material production process that recycles as a resin recycled product used in a vacuum heat insulating material or a vacuum heat insulating material.
[0043]
As described above, the frost that has reached the water repellent refrigeration cooler 22 during the cooling operation is sublimated and melted by the operation of the refrigerating room blower fan 9 while the compressor 11 is stopped. Since the flow of air in the water repellent refrigeration cooler 22 during the operation of the refrigerating room blower fan 9 is in the same direction as gravity, and the surface of the water repellent refrigeration cooler 22 has been subjected to water repellent treatment, All the water droplets remaining on the surface of the water-repellent refrigeration cooler 22 also drop below the water-repellent refrigeration cooler 22 and the amount of frost formation during re-cooling can be suppressed, so that the cooling efficiency of the water-repellent refrigeration cooler 22 is improved. It is possible.
[0044]
Moreover, the non-heat defrosting of the refrigerator compartment can prevent the rise in the internal temperature at the time of defrosting, and can reduce the temperature fluctuation range.
[0045]
In addition, although the water repellent refrigeration cooler 22 of the refrigerator of this invention is a fin coil type heat exchanger, it is not limited to this.
[0046]
(Embodiment 4)
FIG. 6 is a time chart of the fourth embodiment of the refrigerator of the present invention. The operation will be described below with reference to the drawings.
[0047]
When the detected temperature of the freezer compartment temperature detection means 27 exceeds the upper limit of a predetermined freezer compartment temperature range, the compressor 11 and the freezer compartment fan 7 start operation. At this time, if the temperature detected by the refrigerating room temperature detecting means 26 also exceeds the upper limit of a predetermined temperature range of the predetermined refrigerating room temperature, the refrigerating room blower fan 9 also starts operation. As a result, the refrigerant is sent into the water repellent refrigeration cooler 22 and the refrigeration cooler 8, and cooling of the freezer compartment 3 and the refrigeration compartment 2 starts. When the detected temperatures of the freezer compartment temperature detector 27 and the refrigerator compartment temperature detector 26 exceed the lower limit of a predetermined temperature range set in advance, the refrigerator compartment fan 7 and the refrigerator compartment fan 9 stop operating. The compressor 11 stops the operation at the same time as the refrigerator fan 7. When the compressor 11 stops, the operation of the refrigerator compartment blower fan 9 is started again. When the temperature rise of the water repellent refrigeration cooler 22 at an arbitrary time from the start of operation of the refrigerator compartment blower fan 9 is below an arbitrary value, the rotation speed of the refrigerator compartment blower fan 9 is increased and the operation is continued. When the temperature detected by the cooler temperature detecting means 28 exceeds a predetermined cooler temperature set in advance, the refrigerating room blower fan 9 stops its operation.
[0048]
As described above, even if the amount of frost on the water repellent refrigeration cooler 22 is large, the rotation speed of the refrigerator air blower fan 9 is increased to increase the air volume. It is possible to prevent clogging due to frost and improve cooling efficiency.
[0049]
Further, even when the compressor 11 is stopped for a short time, such as during an overload, and the amount of frost on the water repellent refrigeration cooler 22 is large, the water repellent refrigeration cooler 22 is defrosted in a short time. Is possible.
[0050]
【The invention's effect】
As described above, according to the present invention, at least one freezer compartment, a refrigerating cooler provided in the freezer compartment, at least one refrigerating compartment, a refrigerating cooler provided in the refrigerating compartment, A refrigeration cycle in which a refrigerator main body, a compressor, a condenser, a throttling device, the refrigeration cooler, and the refrigeration cooler are sequentially connected to each other, and the refrigeration cooler. And the refrigerating room air supply fan, the refrigerating room air supply fan, and the refrigerating room air supply fan. The refrigerating room air is supplied to the freezing room and the refrigerating room, respectively. Refrigeration composed of a suction duct that leads to a refrigerator, a discharge duct that guides the cool air cooled by the refrigeration cooler to the refrigeration chamber, the refrigeration cooler, the refrigeration chamber blower fan, a suction duct, and a discharge duct Cooler The suction duct forms an inverted U-shaped air passage, the refrigeration cooler is disposed on the downstream side of the air passage of the suction duct, and air is sucked from above the refrigeration cooler In addition, the structure that discharges from the lower portion eliminates the outflow of cold air from the refrigerator room for refrigeration during the compressor operation after the cooling room blower fan stops, and the effect that the internal temperature of the refrigerator compartment can be properly maintained. Have
[0051]
In addition, with the configuration in which the fin pitch at the top of the refrigerator cooler is wide and the fin pitch at the bottom of the refrigerator cooler is narrow, in the refrigerator cooler, air flows in the direction of gravity and gradually follows the air flow. Since the fin pitch is narrowed, the frost formation on the refrigeration cooler is made uniform. Thereby, the air volume at the time of cooling operation is ensured, and the heat exchange of the refrigerator compartment cooler can be maintained with high efficiency. In addition, the defrost cycle of the refrigeration cooler can be extended.
[0052]
In addition, the refrigeration cooler is a water repellent refrigeration cooler with a water repellent treatment on the surface, and the refrigeration cooler blower fan is operated even when the compressor is stopped. Exchange can always be kept highly efficient. Moreover, since defrosting by the heater of the refrigerator for refrigeration is not necessary, power consumption can be reduced. In addition, it has the effect that the rise in the internal temperature during defrosting can be suppressed.
[0053]
Furthermore, the refrigerating compartment blowing fan and the variable rotational speed refrigerating compartment blowing fan, and a refrigerating cooler temperature detecting means for detecting the temperature of the refrigerating cooler, the variable rotational speed refrigerating compartment blowing air from the compressor stops When the temperature of the refrigeration cooler at an arbitrary time from the start of operation during the fan operation is equal to or lower than the arbitrarily set temperature, the variable speed refrigerating chamber until the temperature of the refrigeration cooler reaches the arbitrarily set temperature. Due to the configuration in which the rotation speed of the blower fan is increased from that during normal cooling, the compressor stop time is short, such as when overloading, and even when the amount of frost on the refrigeration cooler is large, the time is short. Thus, the defrosting of the refrigeration cooler can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a first embodiment of a refrigerator according to the present invention. FIG. 2 is a refrigeration system diagram of a first embodiment of a refrigerator according to the present invention. FIG. 4 is a front view of the refrigerator of the third embodiment of the refrigerator according to the present invention. FIG. 5 is a time chart of the third embodiment of the refrigerator of the present invention. Fig. 7 is a time chart of a fourth embodiment of a refrigerator according to the invention. Fig. 7 is a schematic sectional view of a conventional refrigerator.
DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Refrigeration room 3 Freezing room 6 Refrigeration cycle 7 Freezing room blower fan 8 Refrigeration cooler 9 Refrigeration room blower fan 10 Refrigeration cooler 11 Compressor 12 Condenser 13 Throttle device 15 Suction duct 16 Discharge duct 20 For refrigeration Cooler room 22 Water repellent cooler 26 Cold room temperature detection means 27 Freezer room temperature detection means 28 Cooler temperature detection means

Claims

At least one freezing room, a freezing cooler provided in the freezing room, at least one refrigerating room, a refrigerating cooler provided in the refrigerating room, and the freezing room and the refrigerating room are configured independently. The refrigeration cycle in which the refrigerator main body, the compressor, the condenser, the expansion device, the refrigeration cooler, and the refrigeration cooler are sequentially connected, and the refrigeration cooler and the refrigeration cooler exchange heat. A freezer compartment blower fan arranged to supply cold air to the freezer compartment and the refrigerating compartment, a refrigerating compartment blower fan, a suction duct for guiding the air in the refrigerating compartment to the refrigerating cooler, and the refrigerating cooler A discharge duct for guiding cold air cooled by the cooler into the refrigerating chamber, a refrigerating cooler chamber composed of the refrigerating cooler, the refrigerating chamber blower fan, a suction duct, and a discharge duct, and the suction Duct is reverse A character-shaped air passage is formed, the refrigeration cooler is disposed on the downstream side of the air passage of the suction duct, and air is sucked from the upper portion of the refrigeration cooler and discharged from the lower portion. Freezer refrigerator.

2. The refrigerator-freezer according to claim 1, further comprising a refrigeration cooler having a wide upper fin pitch and a narrow lower fin pitch.

The refrigerating cooler and water repellent refrigerating cooler subjected to water repellent treatment on the surface, refrigerator according to claim 1 or 2 wherein characterized in that it also operating the refrigerating compartment blowing fan while the compressor is stopped.

The refrigerating compartment blowing fan and the variable rotational speed refrigerating compartment blowing fan, and a refrigerating cooler temperature detecting means for detecting the temperature of the refrigerating cooler, the variable rotational speed refrigerating compartment blowing fan during the operation of the compressor stops When the temperature of the refrigeration cooler at an arbitrary time from the start of operation is equal to or lower than the arbitrarily set temperature, until the temperature of the refrigeration cooler reaches the arbitrarily set temperature, The refrigerator-freezer according to any one of claims 1 to 3 , wherein the refrigerator is operated at a higher rotational speed than during normal cooling.